Background
Brian Dale Klein sustained a right shoulder injury while employed at Whirlpool Corporation and subsequently underwent surgery that included a distal clavicle excision. The parties agreed Klein had suffered some permanent disability but disputed its extent. Three physicians offered impairment ratings ranging from 2% to 15% upper extremity impairment, with Dr. Mark Taylor’s opinion—assigning 6% for loss of range of motion and an additional 10% for the distal clavicle excision under Table 16-27 of the AMA Guides, combined to a 15% upper extremity impairment—being found most persuasive by the deputy commissioner.
Despite crediting Dr. Taylor’s opinion, the deputy commissioner relied on prior agency precedent (Jay v. Archer Skid Loader Service, LLC) to apply a 25% multiplier from Table 16-18 to the distal clavicle excision impairment, reducing that component from 10% to 2.5% and yielding a total rating of 9%. The commissioner affirmed on intra-agency review, the district court denied Klein’s petition for judicial review, and the Iowa Court of Appeals affirmed. Klein sought further review from the Iowa Supreme Court.
The Court’s Holding
The Iowa Supreme Court vacated the court of appeals decision, reversed the district court judgment, and remanded with instructions to return the case to the workers’ compensation commissioner for further proceedings. The court held that the commissioner had misapplied the AMA Guides by applying the 25% Table 16-18 multiplier to the 10% distal clavicle excision value drawn from Table 16-27—the same error the court had already rejected weeks earlier in Koeller v. Cardinal Logistics Management Corp., decided May 15, 2026.
Applying Koeller directly, the court reiterated that Table 16-27 already expresses an upper extremity impairment value for a distal clavicle excision, making the additional Table 16-18 conversion inapplicable. The specific provisions of AMA Guides section 16.7b prevail over the general conversion methodology in section 16.7, so no further multiplication is warranted once a value is drawn from Table 16-27.
Key Takeaways
- The 10% upper extremity impairment value for a distal clavicle excision under AMA Guides Table 16-27 is not subject to the 25% multiplier found in Table 16-18; applying that multiplier is legal error.
- Because the AMA Guides are incorporated into Iowa workers’ compensation law, their interpretation is a legal question reviewable by courts, not solely a matter of agency discretion.
- This decision follows and applies Koeller v. Cardinal Logistics Management Corp. (Iowa 2026), which resolved the same interpretive dispute; Klein confirms Koeller’s reach across pending cases with identical issues.
- Workers whose distal clavicle excision impairment ratings were reduced by the Table 16-18 multiplier under the now-rejected agency interpretation may be entitled to recalculation on remand.
Why It Matters
Klein v. Whirlpool is a direct application of the Iowa Supreme Court’s recent Koeller decision and signals that the workers’ compensation commissioner’s longstanding practice of applying the Table 16-18 multiplier to Table 16-27 distal clavicle excision values is definitively foreclosed. Claimants who had their shoulder impairment ratings reduced under this methodology—and whose cases remain open or were pending judicial review—now have a clear basis for remand and recalculation at the correct, higher impairment value.
More broadly, the decision reinforces that Iowa courts exercise independent judgment over AMA Guides interpretation rather than deferring to agency construction. Practitioners handling scheduled shoulder injury claims in Iowa should audit prior ratings for distal clavicle excisions to assess whether erroneous reductions were applied and whether relief remains available.